Dandy-roll cleaner.



No. 697,302. Patented Apr. 8, I902.

W. W. WEAVER &. L. H. SANFORD. DANDY BULL CLEANER.

(Application filed Oct. 28, 1901.)

(No Model.) 2 Shaets Shaet l.

m: uoams Pzrzns c0. mom-Lima. WASHINGTON. n. c.

No. 697,302. Patented Apr. 8, I902.

W. W. WEAVER &. L..H. SANFORD. DANDY ROLL CLEANER.

(Application m Oct. 28, 1901. (No Modal.) 2 Sheets-Sheet 2.

Yuzyonms PETERS $0.. mow-mun. WASHINGTON. n. c.

llnrrhn Srnrns PATENT OFFICE.

WVILLIAM WV. WVEAVER AND LEWIS H. SANFORD, OF AUGUSTA, MAINE.

DANDY-ROLL CLEANER.

SPECIFICATION forming part of Letters Patent No. 697,302, dated April 8, 1902.

Application filed October 28,1901. Serial No. 30,330. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM W. WEAVER and LEWIS H. SANFORD, citizens of the United States, residing at Augusta, in the county of Kennebec and State of Maine, have invented a new and useful Dandy Roll Oleaneiyof which the following is a specification.

This invention relates to improvements in the dandy-rolls of paper-making machines, and has for its principal object to provide the roll with improved devices for removing the fibrous matter which it takes up from the paper-web.

A further object is to provide for the perfect cleaning of the mesh from both the inside and the outside of the roll and to prevent the accumulation of froth and fibrous matter within the interior of the roll by removing all of the impurities as soon as they are washed or blown from the mesh.

' l/Vith these and other objects in view the invention consists in the novel construction and combination of parts hereinafter described,illustrated in the accompanying drawings, and particularly pointed out in the appended claims.

In the drawings, Figure 1 is a longitudinal sectional elevation of a dandy-roll provided with a cleaning device arranged and constructed in accordance with the invention. Fig. 2 is an end elevation of the same. Fig. 3 is a transverse sectional elevation of the device on the line 3 3 of Fig. 1.

Similar numerals of reference are employed to designate corresponding parts throughout the several figures of the drawings.

5 5 designate suitable standards arranged on the opposite sides of the frame of the machine and provided with slotted guides for the reception of bearing-blocks 6, through which extend hollow trunnions or bushings 7. To the inner end of each bushing 7 is secured a spider S, and secured to or formed integral with each spider is an annular flanged rim 9, serving as a support for the ends of the wiregauze 10, which forms the working surface of the roll. The bearing boxes or blocks are provided with the usual adj usting-screws 11 for varying the height of the roll from the usual wire table of the paper-machine, and the construction and arrangement of the roll may be that ordinarily followed.

' purities washed from the roll.

At the opposite sides of the machine are secured standards 15 16, serving as supports for pipes 17 and 18, respectively, the former being connected to a flexible pipe 19, leading from a supply of water, steam, or other fluid, and the latter serving as an outlet for the im- The pipe 17 extends through one of the bosses 7 to a point within the spider and is there provided with a vertical section 20, leading to a point near the inner surface of the wire screen 10, at which point is connected to a horizontallydisposed pipe 21, having in its uppersurface a row or rows of perforations, through which the water or other fiuid may be forced into contact with the wire screen. The opposite end of the section 21 of the pipe is supported by a vertical rod or plugged pipe 22, arranged at a point near the opposite end of the roll, as illustrated in Fig. 1. The outlet-pipe 18 extends through one of the bosses 7 and at its inner end is screwed or otherwise secured to a collecting-trough 23, formed of some light sheet metal and so arranged and disposed that all the impurities washed from the upper portion of the roll will be collected and gradually discharged through the pipe 18. The trough is supported in position in any suitable manner, as by clips 24, on the vertical sections 20 and 22 of the water-pipe and by such other connections With the water and the escape pipes as may seem necessary.

At a point immediately above the top of the screen 10 is a curved guard or shield 26, which extends completely over the upper portion of the roll and is supported in position by arms or brackets 27, carried by the bearing-standards 5. The width of the guard is about equal to the width of the collectingtrough, and its opposite sides are curved in such manner as to deflect the water or other fluid inwardly against the surface of the roll. Immediately under the central top portion of the guard is a pipe 30, closed at one end and at its opposite end connected to a pipe 31, leading from a suitable supply of steam, water, or air, which is discharged through a row or rows of perforations formed in the under side of said pipe.

The perforated pipes 21 and 30 are preferably arranged in vertical alinement, and in cleansing the surface of the screen 10 one or other or both pipes may be used, according to the character of the accumulations on the surface of the screen. Where the upper pipe 30 is employed to Wash or blow away the irnpurities, the stream or current of water or other fluid will carry with it the fibrous matter clinging to the screen and deposit the same in the collecting-trough. Where the under pipe 21. is used, the steam or fluid may travel up through the screen into contact with the guard 26 and will be deflected by said guard into contact with the outer surface of the roll, forcing the fibrous matter through the meshes of the screen to be collected in the trough. Owing to the curved edges of the guard it will be impossible for any of the dirt to be Washed around over the outside of the roll and fall on the paper-web. Where both of the pipes are simultaneously employed, the meeting currents will effectually dislodge any accumulated matter, the washing being thorough and effective. As the trough collects all of the fibrous and other matter washed upon the web, there will be no accumulations of dirt in the interior of the screen, and the stoppages rendered necessary for cleansing purposes will be avoided.

While the construction herein described, and illustrated in the accompanying drawings, is the preferred form of the device, it is obvious that many changes may be made in the form, proportions, and details of construction without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described our invention, what we claim is- 1. A cleaning device for a dandy-roll, comprising a collecting-trough situated within the roll, a deflecting-guard arranged above the roll, and a perforated fluid-supply pipe extending longitudinally of said roll.

2. The combination with a dandy-roll, of a collecting-trough, fluid supply and discharge pipes leading into the opposite ends of the roll and adapted to support the trough in position, said fluid-supply pipe being provided with a perforated section arranged above the trough in proximity to the inner surface of the roll, and a deflecting-guard arranged above said roll.

3. The combination with a dandy-roll, of a collecting-trough, a perforated fluid-supply pipe arranged within the roll and above said trough, a perforated fluid-supply pipe arranged outside and at the top of the roll, and a deflecting-guard disposed above said second pipe.

4. The combination with a dandy-roll, having hollow trunnions or bosses at its opposite ends, fluid supply and discharge pipes extending through said bosses, a collectingtrough carried by said pipes and in communication with the discharge-pipe, aperforated pipe-section in communication with the fluidsupply pipe and arranged above the trough in proximity to the inner surface of the roll, a deflecting-guard arranged above said roll, and a perforated fluid-pipe arranged between the guard and the roll, substantially as specified.

5. A cleaning device for a dandy-roll, comprising a collecting-trough situated within the roll, and a perforated fluid-supply pipe arranged above the top of the roll, substanstially as specified.

6. The combination with a dandy-roll having hollow trunnions or bosses 7 at its opposite ends, spiders 8 carried by said bosses, a flanged rim 9 secured to the spider, wiregauze 10 secured to said rim and forming a working surface forthe roll, of fluid discharge and supply pipes 17 and lSextending through 1 said bosses, a perforated pipe-section 2i arranged longitudinally of the roll, a connect ing pipe-section 20 extending between the pipes 17 and 21, a plugged pipe or rod 22 extending between the pipe-section 21 and the discharge-pipe, a collecting-trough 23 supported by said pipes, a curved deflectingguard 26 arranged above the dandy-roll, and a perforated pipe 30 disposed between the guard and the top of the roll andin alinement with the perforated pipe-section 21, substantially as specified.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.

XVILLIAM W. WEAVER. LEWIS H. SANFORD.

Witnesses:

LEWIS SELBING, W. B. TOBEY. 

